In Bonhams’ upcoming Rare Jewels and Jadeite auction, the spotlight is focused on the beauty of coloured stones and is presented under the theme “The Jewels of the World Collection”. Apart from Burmese rubies, Colombian emeralds and Kashmir sapphires, all of which boast highly coveted provenances, gemstones from the far-flung corners of the gemmology world, … Read more Bonhams to auction jewellery worth millions in celebration of coloured gems